Currently I'm planning to setup SIP trunk between VG310(analog phones connected) and a Non-Cisco SIP Server. I'm wondering do I need to purchase any license ? Thank you in advance.
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What is the complete setup? If the VG310 is registered to CUCM then there is no license requirement for trunks on VG from cucm perspective.
I'm planning to connect analog phones to VG310 and then SIP Trunk from VG 310 to Avaya SIP Server and finally from SIP Server to Cisco 2900 Voice Gateway to PSTN via either E1 or FXO.